Runs on a/c. No batteries required.
The Plasma Ball is powered by a Tesla Coil. The Tesla Coil emits a high frequency, high voltage electromagnetic field. This energy caused nearby gasses to glow. The electric arcs are created when the...

Use a radiometer to show that light energy can be converted to mechanical energy.
The vanes, or wings, in the Radiometer are alternately dark and light in color. When the light strikes these wings it transfers heat to each one - but not at the same...